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Attention and characteristics of stainless steel knife gate valve
The stainless steel knife gate valve adopts a knife gate, which has a good shearing effect. It is most suitable for fluids that are difficult to control such as slurry, powder and granule, and fiber. It is widely used in papermaking, petrochemical, mining, drainage, food and other industries. It has a variety of valve seats to choose from, and can be equipped with electric or pneumatic actuators according to on-site control requirements to realize automatic valve operation.
Precautions and characteristics in use: The opening and closing parts of the imported stainless steel knife-shaped gate valve are the gate, and the movement direction of the gate is perpendicular to the direction of the fluid. The imported knife-shaped gate valve can only be fully opened and fully closed. Regulation and throttling.
The gate has two sealing surfaces. The two sealing surfaces of the most commonly used mode gate valve form a wedge. The wedge angle varies with valve parameters, usually 50. The gate of the wedge knife gate valve can be made into one The whole is called a rigid gate; it can also be made into a gate that can produce slight deformation to improve its manufacturability and make up for the deviation of the angle of the sealing surface during the processing. This kind of gate is called an elastic gate.
When the stainless steel knife gate valve is closed, the sealing surface can only rely on the medium pressure to seal, that is, rely on the medium pressure to press the sealing surface of the gate to the valve seat on the other side to ensure the sealing of the sealing surface, which is self-sealing.
Most knife gate valves adopt forced sealing, that is, when the valve is closed, the gate must be forced against the seat by external force to ensure the sealing performance of the sealing surface.
Features of stainless steel knife gate valve:
1. Good sealing effect, U-shaped gasket has good elasticity.
2. Full-diameter design, strong passing ability.
3. Good brake-off effect, can effectively solve the leakage phenomenon of media containing block, particle and fiber after brake-off.
4. The maintenance is convenient, and the seal of the valve can be replaced without removing the valve.